Hemodynamic effects of angiotensin during surgical anesthesia.
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Adolescent↗
Biomedical subjects
J M Wallace
Publications and source records attributed to J M Wallace.
Considerations of complications of permanent transvenous pacemakers.
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Adult↗
Severe pulsus alternans associated with primary myocardial disease in children. Observations on clinical features, hemodynamic findings. Mechanisms and prognosis.
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Cardiac Catheterization↗
Lipoxygenase from wheat. An examination of its reaction characteristics.
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Hydrogen-Ion Concentration↗
Effect of maternal overnutrition during pregnancy on pituitary gonadotrophin gene expression and gonadal morphology in female and male foetal sheep at day 103 of gestation.
The aim was to determine whether nutritionally mediated restriction of placental growth alters foetal body growth, pituitary gonadotrophin gene expression and gonadal development at Day 103 of gestation. Embryos recovered from adult ewes inseminated by a single sire were transferred, singly, into the uteri of adolescent recipients. After transfer, adolescent ewes were offered a high (H, n=16) or moderate (M, n=12) level of a complete diet. Ewes were slaughtered at 103+/-0.2 days of gestation and foetal blood, brain, pituitary and gonads were collected. Mean placental weight was lower (P< 0.01) in H than in M groups but foetal weight and reproductive organ weights were similar. Maternal nutrition did not influence LHbeta or FSHbeta mRNA expression in either sex but FSHbeta mRNA expression was higher (P< 0.001) in female (n=11) than in male (n=17) foetal pituitaries. Mean foetal plasma gonadotrophin concentrations were not influenced by dietary intake in either sex. Plasma progesterone concentrations were lower (P=0.001) in foetuses derived from H compared with M intake dams. Compared with M foetuses (n=5), ovaries from H foetuses (n=6) had fewer primordial follicles (P< 0.05) and fewer follicles in total (P< 0.005). In contrast, maternal nutritional status did not influence either seminiferous cord or Sertoli cell numbers in male foetuses (H, n=10; M, n=7). It is concluded that high maternal nutrient intakes restricted placental growth and altered foetal ovarian follicular development prior to the end of the second third of gestation. The latter effect was independent of gonadotrophin secretion.Crown
Animal Nutritional Physiological Phenomena↗
Peripheral blood lymphocyte subpopulations and mitogen responsiveness in tobacco and marijuana smokers.
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Adult↗
Chemotaxis of peripheral blood and lung leukocytes obtained from tobacco and marijuana smokers.
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Adult↗
Fine needle aspiration of pulmonary lesions via fiberoptic bronchoscopy.
Mediastinal and hilar masses not associated with an endoscopically visible lesion and processes involving only the bronchial submucosa are often difficult to diagnose despite the ability to obtain cytologic and histologic samples via the flexible fiberoptic bronchoscope; necrotic endobronchial lesions are often suspected to be tumorous but may not be biopsied for fear of creating further and uncontrollable bleeding. Diagnostic material from such lesions can be obtained by aspiration with a thin needle localized via the bronchoscope at the site of the lesion and then inserted through the bronchial wall into the mediastinum, hilum or bronchial submucosal area. Not only can the question of neoplasia be answered by this technique, but staging in an inexpensive and non-morbid way can be accomplished. Indications for transbronchial fine needle aspiration, the excellence of cytologic samples thus obtained and the problems encountered using existing disposable equipment are discussed. Four cases are reported briefly as examples of the use of the technique.
Adenocarcinoma↗
Use of preventive interventions by persons infected with type-1 human immunodeficiency virus (HIV-1). The Pulmonary Complications of HIV Study Group.
Measures aimed at preventing complications and slowing progression of type-1 human immunodeficiency virus (HIV-1) can potentially reduce morbidity. Although little is known about the use of such measures, such data are critical for program planning. This study was performed to quantify the frequency and patterns of use for such interventions. We enrolled 1,171 persons infected with HIV, but without an acquired immunodeficiency syndrome (AIDS) defining diagnosis, in a multicenter prospective study of the pulmonary complications of HIV infection. Participants were homosexual/bisexual men, injection drug users (IDUs), or female sexual contacts of HIV-infected men. Centers were university-based and geographically dispersed across the United States. Standardized questionnaires were administered on entry and at three-month or six-month intervals; we correlated use of general and HIV-related preventive measures before entry and during the first three years in study with clinical/epidemiologic characteristics. Overall use of preventive interventions was low; only one third of study entrants had used such measures. Use was greatest among those with advanced HIV infection, but only half used preventive measures on entry; IDUs were less likely than homosexuals to use these services. Although use of interventions such as anti-Pneumocystis and antiretroviral agents increased during study participation, general measures such as pneumococcal vaccine and tuberculosis prophylaxis were used by less than 30% of those eligible for use. Among IDUs, cumulative use of these measures remained below 20% during the first three years of this study. We conclude that HIV-infected persons underuse preventive interventions, particularly general measures.(ABSTRACT TRUNCATED AT 250 WORDS)
AIDS Serodiagnosis↗